Perforating device for printing presses



Jan. 3, 1933. FUNCKE 1,893,053

PEHFORATING DEVICE FOR PRINTING PRESSES Filed Feb. 4, 1932 2 Sheets-Sheet l Jan. 3, 1933.

K. F'UNCKE PERFORATING DEVICE FOR PRINTING PRESSES Filed Feb. 4. 1952 2 Sheets-Sheet fnrenfor:

Patented Jan. 3, 1933 UNETE STATES ATENT GFFIQE KARL FUNCKE, OF OTTWEILEE, GERMANY PERFOR-ATING DEVICE FOR PRINTING PRESSES Application filed February 4, 1932, Serial No. 590,941, and in Germany January 2, 1931.

, The present invention relates to a perforating device.

In the known types of perforating devices combined with printing presses the perforating knife bars are yieldingly disposed in a guide and pressed into perforating pos1tion by bolts which are engaged by a pressure pin which in turn is moved by the machine part carrying the sheet to be printed.

Compared with these existing devices, the essential features of the invention are that the perforating bars are pushed out by a special pressure member or pressure appliance,'in which a control member moved by the printing press acts, by means of an interchangeable toothed disc having notches differing in depth, on the cushioned presser member for the perforating knife bars in such a Way that the presser member, according to its relative position to the toothed disc, is either moved forward by the control member or remains in its position of rest, so that, according to the selection and distribution of the notches on the toothed disc, the perforating operation may be repeated or stopped at will every time the control member is moved by the printing press and the sheets to be printed are either perforated alternately or remain unperforated.

The construction of the perforating knife bars and its means of motion permit the arrangement of any number of bars in different directions of motion.

Two embodiments of the invention are illustrated in the accompanying drawings, in which Figure 1 is a top view of a pressure appliance according to the invention with perforatingknives suspended therefrom; Fig. 2, a side view thereof; Fig. 3, a front view of the appliance; Figs. 4 to 8 are detail views of the appliance; Fig. 9 is one-half of a knife sheath; Fig. 10, a top view of a closed perforating knife; Fig. 11, a front view of two half-sheaths according to Fig. 9; Fig. 12, a front view of a closed perforating knife; Fig. 13 shows a transmission of motion from one direction into a vertical one; and Fig. 14 shows an opened perforating knife, in which tensioning means cause the lateral displacement of the bolts in lieu of the pressure appliance.

Referring to the drawings The perforating knives which can be disposed one behind the other consist each of two half-members a, b which can be connected by screws and be tween which a recoiling knife slide cl cushioned by the springs 0, c and a cushioned bolt 6 provided with the cams f, f are displaceably arranged. The cams f, 7, when in av position of rest, are in engagement with the clearances g, g of the slide d and, on the displacement of the bolt 6, press the knife up into perforating position, the knife returning automatically into its initial position after the pressure exerted on it ceases owing to the return of the parts to their positions of rest. The rear side of the bolt 6 is fitted with a pin it which comes into engagement with the spring pin 2' of the following knife (Z or with the spring pin 2' of a bolt member (1, so that all perforating knives cl arranged directly or indirectly behind one another are synchronously actuated in the manner de scribed.

The pressure appliance comprises a casing 7' containing the rotatable shaft is carrying the fixed ratchet wheel Z cooperating with a pawl m and the two loosely rotatable gears n, 0 which are fitted with the levers a, 0. To the lever 0 a cushioned gripper lever q is attached which is in engagement, on the one hand, with the notches of an interchangeable toothed disc 1 slipped over the square end of the shaft and, on the other hand, with the angular arm of the lever n. Owing to this arrangement, during successive depressions of the yieldingly arranged rack s which moves the lever 0 with the lever q to and fro by means of the intermediate gear 20, the lever n of the gear n pushing the pin 6 forward is either driven to carry out its motion or left in its position of rest. The perforating knives (Z whether directly or indirectly arranged in succession can also be fed by some other suitable device controlled by a movable part of the press, such as the tensioning means 2); 'w is a shank of the inking roller rods in an automatic platen press.

In the connection of perforating knives shown in Fig. 13 involving a change of motion from One direction to the one vertical to the former one, motion is transmitted by a ball y-interposed between the pressure pin of the driving perforating bar and an oblique tongue m of the driven bar, the perforating .knives d meeting at right angles in this arrangement which preferably employs tensioning means instead of a pressure appliance. If a pressure appliance of the kind described is used, this right-angled arrangement can be dispensed with, since special pressure appliances are secured for each horizontal and vertical arrangement of the perforating bars on the frames of the press concerned.

Skipping of printing steps can be effected by means: of the toothed discs which have two kinds of notches of different depth. When the angular arm of the gripper lever g engages a deep notch, the lever will. passthe nose of the lever'n" Without altering the latters position of'rest, so that the perforating device remains inits position of rest also. If. the lever q engages one of the notches: of lesser depth, it. will strike the nose of the lever n, turn the latter and the: gear a which is integral with. the lever n", and cause the bolt t which is in engagement with the gear a tobe pushed out. of the casing j'whereby the perforating'bard is alternately pressed up. into perforating position.

exchanging the. perforating disc for one havoperations canbe attained.

In the construction shown, two successive perforating operations take place when smgle sheets are printed while perforating stops forating' operations parallel to the pressure dispensed with.

Further, the laminated springs for the perforating" bars may be replaced by helical springs and the notches cooperating with the cam bolts by noses witha. unilateral inclined surface. For changing the bolt motion-into rol'l,.a second pressure appliancecould be I claim 1. In a printing press, a perforating device comprising a plurality of bipartite perforating knife holders, a cushioned recessed slide having a perforatingknife edge and a cushioned cam bolt disposed within each of the said bipartite knife holders, the cams of the said-bolt being adapted to engage the recesses in the said slide, a pressure appliance connected with the said knife holders and bolt and consisting of a casing, a rotatable shaft herein, a toothed disc having notches differing in depth, means for connecting the said toothed disc with thesaid shaft and engagingthe said notches, a control member actuated by the press and means connecting the said control member with the said toothed disc torender the said knives operative and inoperative.

2. A perforating device according to claim 1, in'which the cam bolts arev jointly returned into their position of rest by a cushioned member;

3. A perforating device according to claim.

1, in which the cam bolts have broadened portions terminating in any inclined surface and a blunt end for changing the direction of motion of the bolts.

. KARL. FUNCKE.

,ing another arrangement of notches any other orderin the succession of perforating another one going on in a direction angularly V disposed to the first one the bolts could be pro-- vide'd a-tathe changing point with a broadening'correspondingto the lift and one of-the broadened portions: could have an inclined surfacemeeting a sharp edge of the-other broadeningextending angularly thereto so as to efiect transmission of motion during the displacement of the inclined surface; 

